001    // License: GPL. For details, see LICENSE file.
002    package org.openstreetmap.josm.io.session;
003    
004    import static org.openstreetmap.josm.tools.I18n.tr;
005    
006    import java.io.IOException;
007    import java.util.HashMap;
008    import java.util.Map;
009    
010    import org.openstreetmap.josm.data.Preferences;
011    import org.openstreetmap.josm.data.imagery.ImageryInfo;
012    import org.openstreetmap.josm.data.imagery.ImageryInfo.ImageryPreferenceEntry;
013    import org.openstreetmap.josm.gui.layer.ImageryLayer;
014    import org.openstreetmap.josm.gui.layer.Layer;
015    import org.openstreetmap.josm.gui.progress.ProgressMonitor;
016    import org.openstreetmap.josm.io.IllegalDataException;
017    import org.openstreetmap.josm.io.session.SessionReader.ImportSupport;
018    import org.w3c.dom.Element;
019    import org.w3c.dom.Node;
020    import org.w3c.dom.NodeList;
021    
022    /**
023     * Session importer for both TMSLayer and WMSLayer.
024     */
025    public class ImagerySessionImporter implements SessionLayerImporter {
026    
027        @Override
028        public Layer load(Element elem, ImportSupport support, ProgressMonitor progressMonitor) throws IOException, IllegalDataException {
029            String version = elem.getAttribute("version");
030            if (!"0.1".equals(version)) {
031                throw new IllegalDataException(tr("Version ''{0}'' of meta data for imagery layer is not supported. Expected: 0.1", version));
032            }
033            Map<String, String> attributes = new HashMap<String, String>();
034    
035            NodeList nodes = elem.getChildNodes();
036    
037            for (int i=0; i<nodes.getLength(); ++i) {
038                Node node = nodes.item(i);
039                if (node.getNodeType() == Node.ELEMENT_NODE) {
040                    Element e = (Element) node;
041                    attributes.put(e.getTagName(), e.getTextContent());
042                }
043            }
044            ImageryPreferenceEntry prefEntry = Preferences.deserializeStruct(attributes, ImageryPreferenceEntry.class);
045            ImageryInfo i = new ImageryInfo(prefEntry);
046            final ImageryLayer layer = ImageryLayer.create(i);
047            return layer;
048        }
049        
050    }